CVE-2021-42171

HIGH

Zenario < 9.0.55143 - Unauthenticated Remote Code Execution via File Upload

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2021-42171. PoCs published by minhnq22.

AI-analyzed exploit summary This exploit demonstrates an authenticated RCE vulnerability in Zenario CMS 9.0.54156 by uploading a malicious DOCX file containing embedded PHP code. The exploit first authenticates to the CMS, then leverages the document upload functionality to achieve remote code execution.

Description

Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run commands, browse system files, browse local resources, attack other servers, and exploit the local vulnerabilities, and so forth.

Exploits (2)

exploitdb WORKING POC
by minhnq22 · pythonwebappsphp
https://www.exploit-db.com/exploits/50850

This exploit demonstrates an authenticated RCE vulnerability in Zenario CMS 9.0.54156 by uploading a malicious DOCX file containing embedded PHP code. The exploit first authenticates to the CMS, then leverages the document upload functionality to achieve remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Zenario CMS 9.0.54156
Auth required
Prerequisites: Valid credentials for the Zenario CMS admin panel · Network access to the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by minhnq22 · poc
https://github.com/minhnq22/CVE-2021-42171

This exploit demonstrates an authenticated file upload vulnerability in Zenario CMS 9.0.54156, leading to remote code execution via a malicious DOCX file upload. The PoC includes authentication, session handling, and payload delivery.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Zenario CMS 9.0.54156
Auth required
Prerequisites: Valid admin credentials · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/hieuminhnv/Zenario-CMS-9.0-last-version/issues/2

Scores

CVSS v3 7.2
EPSS 0.1781
EPSS Percentile 95.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-434
Status published
Products (2)
tribalsystems/zenario 9.0.54156
tribalsystems/zenario 0 - 9.0.55143Packagist
Published Mar 14, 2022
Tracked Since Feb 18, 2026